如何使用Jetpack Navigation从嵌套片段导航到父片段？

Question

我有主导航：SplashFragment - > RegistrationFragment - > RootFragment

<fragment
    android:id="@+id/splashFragment"
    android:name="com.low6.low6.features.splash.SplashFragment"
    android:label="Splash"
    tools:layout="@layout/fragment_splash" >
    <action
        android:id="@+id/action_next"
        app:clearTask="true"
        app:destination="@id/registrationFragment" />
</fragment>

<fragment
    android:id="@+id/registrationFragment"
    android:name="com.low6.low6.features.registration.RegistrationFragment"
    android:label="Register">
    <action
        android:id="@+id/action_next"
        app:clearTask="true"
        app:destination="@id/rootFragment" />
</fragment>

<fragment
    android:id="@+id/rootFragment"
    android:name="com.low6.low6.core.RootFragment"
    android:label="@string/home"
    tools:layout="@layout/fragment_root" />

我有嵌套注册导航：RegistrationPersonalFragment - > RegistrationContactFragment - > RegistrationSecurityFragment

<fragment
    android:id="@+id/registrationPersonalFragment"
    android:name="com.low6.low6.features.registration.RegistrationPersonalFragment"
    android:label="Register">

    <action
        android:id="@+id/action_next"
        app:destination="@+id/registrationContactFragment" />
</fragment>

<fragment
    android:id="@+id/registrationContactFragment"
    android:name="com.low6.low6.features.registration.RegistrationContactFragment"
    android:label="Register">

    <action
        android:id="@+id/action_next"
        app:destination="@+id/registrationSecurityFragment" />
</fragment>

<fragment
    android:id="@+id/registrationSecurityFragment"
    android:name="com.low6.low6.features.registration.RegistrationSecurityFragment"
    android:label="Register">

    <action
        android:id="@+id/action_next"
        app:destination="@+id/rootFragment" />
</fragment>

如何使用Jetpack导航组件从最后一个嵌套的RegistrationSecurityFragment重定向到RootFragment？

目前

<action
    android:id="@+id/action_next"
    app:destination="@+id/rootFragment" />

和

   navigateTo(R.id.action_next)

给我

    java.lang.IllegalArgumentException: navigation destination com.xxx:id/rootFragment referenced from action com.xxx:id/action_next is unknown to this NavController
    at androidx.navigation.NavController.navigate(NavController.java:691)
    at androidx.navigation.NavController.navigate(NavController.java:648)
    at androidx.navigation.NavController.navigate(NavController.java:634)
    at com.xxx.core.BaseFragment.navigateTo(BaseFragment.kt:73)
    at com.xxx.core.BaseFragment.navigateTo$default(BaseFragment.kt:66)
    at com.xxx.features.registration.RegistrationSecurityFragment$epoxyController$1$$special$$inlined$button$lambda$1.onClick(RegistrationSecurityFragment.kt:106)
    at android.view.View.performClick(View.java:6597)
    at android.view.View.performClickInternal(View.java:6574)
    at android.view.View.access$3100(View.java:778)
    at android.view.View$PerformClick.run(View.java:25885)
    at android.os.Handler.handleCallback(Handler.java:873)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:193)
    at android.app.ActivityThread.main(ActivityThread.java:6669)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)

Answer 1

如果您有多个导航图，请确保使用正确的导航控制器。在某些情况下使用Navigation.findNavController（view），您可能需要获取根视图以获取根的导航。希望，这会有所帮助。

Answer 2

在您的代码中，您可以将全局操作的资源ID传递给每个UI元素的navigate()方法。

your_button.setOnClickListener(new View.OnClickListener() {
   @Override
   public void onClick(View view) {
       Navigation.findNavController(view).navigate(R.id.main_fragment);
   }
});

Answer 3

感谢@Vladimir回答我提出了这个解决方案

val mainNavView = requireActivity().findViewById<View>(R.id.mainNavFragment)
Navigation.findNavController(mainNavView).navigate(R.id.action_next)